Finding the Fourth Proportional to 139,335.59, 209,002.27 and 82,801.30

Step by Step Solution

1. Step 1: Write the proportion equation
   139,335.59 : 209,002.27 = 82,801.30 : x
2. Step 2: Convert to fraction form
   139,335.59/209,002.27 = 82,801.30/x
3. Step 3: Cross multiply
   139,335.59x = 209,002.27 × 82,801.30
4. Step 4: Simplify right side
   139,335.59x = 17,305,659,658.95
5. Step 5: Solve for x
   x = 17,305,659,658.95/139,335.59
6. Step 6: Final answer
   x = 124,201.29